Can't send outgoing mail from gmail account
Using Mail 4.5, I'm having trouble with my outgoing mail on my gmail account on my Mac. I can receive mail to this account, just not send. I can send and receive to/from my other email accounts. But mail sent from my gmail account just sits there in the Outbox while the wheel next to the Sent folder spins and spins and spins. I can send from this account using my iPhone, so apparently it's an issue with my Mac here at work.
I don't know if this has anything to do with it at all, but today I did install the latest Apple Security Update.
3GHz Mac Pro, Mac OS X (10.6.6), 12GB RAM